SEPM 14.3 RU5 no longer supports Windows Server 2008 or 2008 R2.
You can now enforce stricter administrator password requirements, including specific character types and lengths ranging from 8 to 1024 characters. symantec endpoint protection 14.3 ru5
(build 14.3.558.0000) is a maintenance release within the 14.3 branch of SEP, published by Broadcom (which acquired Symantec’s enterprise security division). This release focuses on stability, performance, and security posture improvements rather than introducing radically new features. SEPM 14